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@kon_yu
@kon_yu

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How to create a string of numbers with , $, €, or £ in JavaScript.

#javascript

To display a string of money in JavaScript with a comma, use the toLocaleString method.

ref: toLocaleString specification: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toLocaleString

Japanese Yen 

const price = 1234567890.1234
const jpy = price.toLocaleString('JP',
  { style: 'currency', currency: 'JPY' })

console.log(jpy)
// => ￥1,234,567,890
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U.S. dollar 

const price = 1234567890.1234
const usd = price.toLocaleString('US',
  { style: 'currency', currency: 'USD',})

console.log(usd)
// => $1,234,567,890.12"
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Euro 

const price = 1234567890.1234
const eur = price.toLocaleString('DE',
  { style: 'currency', currency: 'EUR' })
console.log(eur)
//=> 1.234.567.890,12 €
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British pound 

const pond = price.toLocaleString('GB',
  { style: 'currency', currency: 'GBP',})
console.log(pond)
//=> "£1,234,567,890.12"
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